NER Class D

NER Class D
LNER Class H1

Type and origin Power type Steam Designer Vincent Raven Builder NER Darlington Build date 1913,1920—1922 Total produced 45

Specifications Configuration 4-4-4T Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 1 1⁄4 in (0.946 m) Driver dia. 5 ft 9 in (1.753 m) Trailing dia. 3 ft 1 1⁄4 in (0.946 m) Wheelbase 34 ft 6 in (10.52 m) Loco weight 87.35 long tons (88.75 t; 97.83 short tons) Fuel type Coal Fuel capacity 4 long tons (4.1 t; 4.5 short tons) Water cap 2,000 imp gal (9,100 l; 2,400 US gal) Firebox:  • Firegrate area 23 sq ft (2.1 m2) Boiler pressure 160 psi (1.1 MPa) Heating surface 1,252.974 sq ft (116.4051 m2)  • Tubes 654.24 sq ft (60.781 m2)  • Flues 280.6 sq ft (26.07 m2)  • Firebox 124 sq ft (11.5 m2) Superheater: ​  • Type Schmidt  • Heating area 194.13 sq ft (18.035 m2) Cylinders three Cylinder size 16 1⁄2 in × 26 in (419 mm × 660 mm) Valve gear Stephenson

Performance figures Tractive effort 22,940 lbf (102.0 kN)

Career Operators North Eastern Railway, London & North Eastern Railway Retired 1931-1936 Disposition All rebuilt to LNER Class A8

Type and origin
Power type	Steam
Designer	Vincent Raven
Builder	NER Darlington
Build date	1913,1920—1922
Total produced	45

Specifications
Configuration	4-4-4T
Gauge	4 ft 8 1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 1 1⁄4 in (0.946 m)
Driver dia.	5 ft 9 in (1.753 m)
Trailing dia.	3 ft 1 1⁄4 in (0.946 m)
Wheelbase	34 ft 6 in (10.52 m)
Loco weight	87.35 long tons (88.75 t; 97.83 short tons)
Fuel type	Coal
Fuel capacity	4 long tons (4.1 t; 4.5 short tons)
Water cap	2,000 imp gal (9,100 l; 2,400 US gal)
Firebox:  • Firegrate area	23 sq ft (2.1 m2)
Boiler pressure	160 psi (1.1 MPa)
Heating surface	1,252.974 sq ft (116.4051 m2)
• Tubes	654.24 sq ft (60.781 m2)
• Flues	280.6 sq ft (26.07 m2)
• Firebox	124 sq ft (11.5 m2)
Superheater:	​
• Type	Schmidt
• Heating area	194.13 sq ft (18.035 m2)
Cylinders	three
Cylinder size	16 1⁄2 in × 26 in (419 mm × 660 mm)
Valve gear	Stephenson

Performance figures
Tractive effort	22,940 lbf (102.0 kN)

Career
Operators	North Eastern Railway, London & North Eastern Railway
Retired	1931-1936
Disposition	All rebuilt to LNER Class A8

The North Eastern Railway Class D (later London and North Eastern Railway (LNER) Class H1) was a class of 4-4-4T three-cylinder side tank steam locomotive designed by Vincent Raven in 1913. They were used for rural passenger services. Forty five were built in total; a first batch of twenty, then a further twenty five after the War.

Between 1931 and 1936, all of the LNER H1 class were rebuilt with a 4-6-2T wheel layout and re-classified as A8. They were scrapped between 1957 and 1960.

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